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14. Water flows in a tank 150 m Ă 100 m at the base, through a pipe whose cross-section is 2 dmby 1.5 dm at the speed of 15 km/hour. In what time, will the water be 3 metres deep?T |
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Answer» Length of cross section of pipe = 2 dm = 0.2 mBreadth of cross section of pipe = 1.5 dm = 0.15 mArea of cross section = 0.2 × 0.15 = 0.03 m^2Speed of water = 15 km/h = 15000 m/hVolume of water flown in 1 h = 0.03 × 15000 = 450 m^3Dimensions of the water tank = 150 × 100Volume of water for a depth of 3 m = 150 × 100 × 3 = 45000 m^3Time taken to fill the tank to a depth of 3 m = (45000) / (450) = 100 hrs. |
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